U.S. patent application number 12/758880 was filed with the patent office on 2010-10-21 for plastic capsule for the storage and delivery of flowable dental materials and applicator to contain them.
This patent application is currently assigned to HERAEUS KULZER GMBH. Invention is credited to Andrej Albach, Hans-Joachim Zumkeller.
Application Number | 20100266978 12/758880 |
Document ID | / |
Family ID | 42557364 |
Filed Date | 2010-10-21 |
United States Patent
Application |
20100266978 |
Kind Code |
A1 |
Albach; Andrej ; et
al. |
October 21, 2010 |
Plastic capsule for the storage and delivery of flowable dental
materials and applicator to contain them
Abstract
The invention relates to a plastic capsule for the storage and
delivery of dental material, the capsule exhibiting a cylindrical
cavity in a first capsule section and connecting the first and a
third capsule section in a second capsule section and the third
capsule section being a dispensing nipple angled with respect to
the first capsule section characterised in that the first capsule
section exhibits a reinforced longitudinal side and a longitudinal
formed in a round manner and the reinforced longitudinal side is an
edge on a round tube, the edge forming the reinforcement, and to
similar capsules with two reinforcement edges.
Inventors: |
Albach; Andrej; (Wehrheim,
DE) ; Zumkeller; Hans-Joachim; (Weilrod, DE) |
Correspondence
Address: |
Hildebrand, Christa;Norris McLaughlin & Marcus PA
875 Third Avenue, 8th Floor
New York
NY
10022
US
|
Assignee: |
HERAEUS KULZER GMBH
Hanau
DE
|
Family ID: |
42557364 |
Appl. No.: |
12/758880 |
Filed: |
April 13, 2010 |
Current U.S.
Class: |
433/80 ;
264/328.2 |
Current CPC
Class: |
A61C 5/66 20170201 |
Class at
Publication: |
433/80 ;
264/328.2 |
International
Class: |
A61C 5/04 20060101
A61C005/04; B29C 45/00 20060101 B29C045/00 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 21, 2009 |
DE |
10 2009 017 980.1 |
Claims
1. The plastic capsule for storage and delivery of dental material
comprising a first capsule section (1), a second capsule section
(2), and a third capsule section (3), a cylindrical cavity (4) in
the first capsule section (1), connecting the first and a third
capsule section (3) to a second capsule section (2) and the third
capsule section (3) being a dispensing nipple angled with respect
to the first capsule section (4), wherein the first capsule section
(1) comprises a reinforced longitudinal portion and a rounded
longitudinal portion and the reinforced longitudinal portion
includes an edge on a round tube, the edge forming the
reinforcement.
2. The plastic capsule for storage and delivery of dental material
comprising a first capsule section (10), a second capsule section
(2), and a third capsule section (3), a cylindrical cavity (4)
disposed in the first capsule section (1) and connecting the first
and the third capsule section in a second capsule section (2) and
the third capsule section (3) being a dispensing nipple (3) angled
with respect to the first capsule section (1), wherein the first
capsule section (1) comprises a flat longitudinal side and a
longitudinal side formed in a round manner and the flat
longitudinal side includes two edges as reinforcements vis-a-vis a
round tube.
3. The plastic capsule according to claim 1, wherein the first
capsule section (1) includes a collar.
4. The plastic capsule according to claim 1, wherein the first
capsule section (1) exhibits at least 20% by weight more material
as a result of the reinforcement than a round tube without
reinforcement.
5. The plastic capsule according to claim 4, wherein the first
capsule section (1) exhibits at least 30% by weight more material
as a result of the reinforcement than a round tube without
reinforcement.
6. The plastic capsule according to claim 5, wherein the first
capsule section (1) exhibits at least 50% by weight more material
as a result of the reinforcement than a round tube without
reinforcement.
7. The plastic capsule according to claim 1, wherein the
reinforcement is arranged on the side facing away from the
dispensing nipple (3).
8. The plastic capsule according to claim 1, wherein the
cylindrical cavity (4) is formed between an externally round groove
and an externally cuboid groove.
9. The plastic capsule according to claim 1, wherein the plastic
capsule is formed in one piece.
10. The plastic capsule according to claim 1, wherein is the
plastic capsule is inscribed with four lines on a flat side.
11. The plastic capsule according to claim 1, wherein the plastic
capsule is suitable of applying a viscous dental compound.
12. The plastic capsule according to claim 1, wherein the plastic
capsule has a discharge force of 600 N to 2000 N.
13. A process for injection moulding for the production of a
plastic capsule comprising the steps of providing a first capsule
section (1) having a cylindrical cavity (4), a central capsule
section (2) connecting the first and a third capsule section and a
third capsule section (3) which is a dispensing nipple (3) angled
with respect to the first capsule section (1), wherein the first
capsule section (1) is formed as a round tube longitudinally
reinforced by an edge.
14. A process for injection moulding for the production of a
plastic capsule comprising the steps of p1 providing a first
capsule section (1) having a cylindrical cavity (4), a central
capsule section connecting the first and a third capsule section
and a third capsule section (3) which is a dispensing nipple (3)
angled with respect to the first capsule section (1), wherein the
first capsule section (1) is formed in a round manner on a first
side and in a flat manner on a second side.
15. An applicator for receiving and discharging dental material
from a plastic capsule according to claim 1, wherein the receiving
device for the plastic capsule is axially rotatable.
16. The applicator according to claim 15, wherein the device for
accepting the plastic capsule exhibits two locking positions.
17. The plastic capsule according to claim 11, wherein the viscous
dental compound has a viscosity of 8.5 to 10.sup.6 MPa.
18. The plastic capsule according to claim 12, wherein the plastic
capsule has a discharge force of 600 N to 1000 N.
Description
BACKGROUND OF THE INVENTION
[0001] (1) Field of the Invention
[0002] The invention relates to a plastic capsule for the storage
and delivery of dental material with an angled dispensing nipple on
a cylindrical channel. The outside diameter and a minimal inside
diameter are determined by applicators commonly available on the
market. The corresponding applicator is a retaining and pressing
device resembling pliers. The invention also relates to such an
applicator and the interaction of applicator and capsule and to the
manufacture of the capsules.
[0003] (2) Description of Related Art
[0004] A category-appropriate capsule is formed according to DE 102
18 859 A1/B4 by a tube with a circular cross-section, a circular
collar being arranged at a first end. The inside diameter tapers in
a second section. If the discharge pressure is too high, the collar
or a third collar section which, as discharge channel, exhibits an
angle .alpha. in the region of 30 degrees to 60 degrees vis-a-vis
the longitudinal axis of the first capsule section, breaks.
BRIEF SUMMARY OF THE INVENTION
[0005] The object of the present invention is the provision of
capsules which withstand a higher discharge pressure and which are
as easy to inscribe as possible.
[0006] To achieve this object, the capsule is reinforced on one
side, in particular formed level on the longitudinal side of the
channel situated opposite the exit side. The mass and/or the
cross-section surface of the capsule can be increased in this area
by 20%, in particular by more than 30% and particularly preferably
by more than 50%.
[0007] Solutions according to the invention are described in the
independent claims. The dependent claims describe preferred
embodiments.
[0008] According to the invention, a plastic capsule is provided
for the storage and delivery of dental material, which plastic
capsule exhibits a cylindrical cavity in a first capsule section. A
second capsule section formed as an adapter adapts a third capsule
section angled with respect to the first capsule section and
serving as dispensing nipple to the first capsule section as
regards the external and the internal shape. According to the
invention, an edge-type reinforcement of the first capsule section
or a flat longitudinal side based on two edges is formed.
[0009] In a preferred embodiment, a level longitudinal side runs
between two edges in such a way that a round basic body is
reinforced by two essentially triangular strands formed beyond the
round shape.
[0010] Basically, a reinforcement in the form of an almost
triangular strand is also possible such that, in this embodiment,
the first capsule section has an outline which has the appearance
as if a gabled roof was placed on top of the round tube. In the
case of this embodiment, the cavity of the first capsule section is
enclosed more by the round tube than by the two surfaces of the
reinforcement arranged in a triangular manner which reinforcement,
in this case, is an edge.
[0011] In the preferred embodiment with a planar surface between
two edges, the reinforced area exhibits, with respect to the
outside dimensions, the characteristics of a cube and encloses the
cylindrical cavity by half with the non-reinforced part of the
plastic capsule formed as a round tube half.
[0012] The solution according to the invention makes it possible to
provide, by a one-sided reinforcement, a stabilised capsule which
remains unchanged regarding the dimensioning to existing applicator
pistons and caps for the dispensing nipple. The first capsule
section is increased in terms of its mass, its material volume and
its material-exhibiting cross-sectional surface area, by the
reinforcement, in comparison with a round tube. As a result of the
thin tube wall, the reinforcement has a strong effect. The
reinforcement going beyond a round tube amounts to 20% or more mass
or volume of the material, based on a round tube, in particular
more than 30%. Reinforcements which exhibit at least 50% of the
mass of a round tube on which they are based, are possible
according to the invention.
[0013] It has proved useful to manufacture the capsules in one
piece, to arrange the reinforcement and the dispensing nipple on
opposite sides or to form the first capsule section with a
collar.
[0014] As a result of the reinforcement, the capsule is able to
withstand much higher discharge pressures of >1000 N. In
addition, the flat surface provides suitable space for applying
information such as the product name, batch name and the use-by
date. The embodiment with a rectangular collar leads to an
unambiguous alignment in the applicator. The edges or straight
surfaces permit alignment of the capsule during automated
manufacture. In the following, the invention is described in
further detail with reference to the attached drawings.
[0015] The formation of the capsule with a flat side allows a
simple, easily legible four-line inscription to be applied. The
flat surface can be inscribed highly efficiently using a laser. A
rough inscription of the round parts can be achieved by means of
embossed injection moulded parts. According to an embodiment
according to the invention, the capsule is produced by injection
moulding. The reinforcement is determined by the outside dimensions
of the injection mould. If the injection mould has an edge, the
edge is reproduced during the injection moulding process as
reinforcement of the capsule. If the injection mould is a profile
which is rectangular on one side and round on the other side, a
flat side of the capsule is formed based on two edges.
[0016] In the case of the applicators which are available, the
capsule according to the invention is fixed in terms of its
position since, due to the edge, the capsule can no longer be
turned in the device accepting the capsule. According to the
invention, an applicator with an axially rotatable retaining
facility is therefore provided for the capsule. In a preferred
embodiment, the applicator has two locking positions permitting
preferred retention on application of the dental material in the
lower or the upper jaw. The applicator can be autoclaved in order
to satisfy the hygiene requirements.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)
[0017] FIG. 1 shows a perspective view of the capsule;
[0018] FIG. 2 shows a technical drawing of the sections
characterising the capsule.
DETAILED DESCRIPTION OF THE INVENTION
[0019] According to FIG. 2, a single-piece plastic capsule consists
of three capsule sections 1, 2 and 3. Capsule section 1 exhibits a
collar 6 and capsule section 3 exhibits a cylindrical cavity 4. The
circumference of the cross-section 7 of capsule section 1 is
composed of a semi-circle and square half, the diameter of the
semi-circle corresponding to the length of the square such that two
corresponding mould parts merge into one another in a flush manner.
In comparison with a circular embodiment, the cross-section is
enlarged by the edges of the square which, each taken on its own,
form approximately the shape of a right-angled triangle. The
triangular form is disturbed by the hypotenuse being dented by the
circular arc. The edges are rounded and exhibit a right angle
corresponding to the square part of the circumference.
Consequently, the reinforcement consists of two prisms with a
right-angled, approximately triangular base surface. The deviation
from the triangle shape corresponds to the replacement of the
hypotenuse by the circular arc. The collar 6 skirts the outer
contour of capsule section 1.
[0020] The adaptation part 2 has an inside diameter with a
stump-type course which provides a flush transfer between the
cylindrical cavity 4 and the inside diameter of the dispensing
nipple 3. In parallel, the outer dimension of capsule section 1
passes over to the outer dimension of the dispensing nipple. This
is followed on both sides by two triangular surfaces around which
the cuboid external surfaces of the reinforcement continue up to
the dispensing nipple in a tapering manner. For the adaptation of
the base surface 7 of the cube to the dispensing nipple, the
adaptation part is given a trapeze shaped surface which is adapted
to the dispensing nipple by way of a round cut-out.
[0021] The plastic capsule is produced by the plastic injection
moulding process. For this purpose, the material is plasticised in
an injection unit using an injection moulding machine and injected
into an injection moulding tool. The cavity in the injection
moulding tool determines the shape and surface structure of the
finished part. For the formation of the inside contour, cores are
inserted. All common plastics (PE, PP, POM, PA) can be used. In
order to ensure imperviousness to light of the capsules, the
plastic is dyed in an appropriate manner before processing.
[0022] Following the production of the plastic capsule, it is
washed in order to comply with the hygiene requirements.
[0023] The plastic capsule thus produced is filled with a highly
viscous product (P9), whose viscosity amounts to 8.5-10.sup.6 MPa.
The capsule is closed with caps and, after removal of the caps,
used with a discharge force of >1000 N. In contrast to the known
capsules, no unserviceable capsules can be observed among the
capsules according to the invention.
* * * * *